Velocipede



Jan. 1, 1935. c. A. HULT 1,985,895

VELOGIPEDE Filed Oct. 1, 1932 Y 5 Sheets-Sheet 1 Ce rl HUH' INVENTOR:

Jan. 1, 1935.

Filed Oct. 1, 1932 c. A. HULT 1,985,895

VELOCIPEDE v 5 Sheets-Sheet 2 C d Atnk HM INvENTon;

Mtomq Jan. I, 1935.

c. A. HULT' VELOCIPEDE Filed Oct. 1; 1952 '3 Sheet s'-Sheet 3 C rl Alrik HUM This invention relate's to irnfirovemerits in mo torcycles and moreqpart'iciilarly in bicycles to which a-motor is attached; "and the invention has for its" object to-efiect resiliehtar'id srnooth power transmission from "the motor tothe wheel of the bicycle preferably through a. g'earing mounted; in a 'gear casing which permitsthe use of different gears aswellas oi'fre-motion. 3 "-Due to thetresilient ino ting of the'motor'and to the resilient a nds'mooth power transmission from the motor to the'wheelof thecycle' a an: side'rablepart' of the vibrations from the motor is averted'froni the frame of" the cycle. 1 The present arrangementneiitralizes the shocks 'frofn an unev' road surface' by -which the'bi'cycle} the motor and thegear ca'se are' saved to "a considerable' eict enti further advantagefis 5 that change fspe d engagement is"'consid'erably facili tated. 1

Accordingto this invention a motor driven cycle 'compri'ses a' power nnit moiinted to oscil late aboiit the axis of one of the whee1s ofthe cycle, and resilientlyjconstrained-against rock ingmoyer'iient; and a r ilient transmission sys tni for transmitting K bower; from: t e nnit t the cycle wheel. Preferably {the "tran'sfiiissibn system '-is' of; the gearftyfie' and comprises Qne-or-rnor'e gears rnoy-f able into 'rfi'sh-with a; gear connected-to the hub of one *or r the wheels of thefkifiClQto effect con hc'non and disconnection of t e" peeve r in If more than one gear'befproi idedthe-gears may was different diameter so that a variationin the 'speed or the drive mayfbeflefiected. Prefershe also siich gearsare mo1intedin Pa casing adapted to rotate about the engine shaft, to bring the gears-into and out of nieshfivith-"the' gearon the huboforieof the cyclewheels'; T The invention is illustrated by way of the accompanying drawingsE f "T"? o, 7 l wa i yd ;.F sur .l' i ej mmmti arranged asa notor, cycle v Fi re 23 a sub te i eei fii i a -i na i wvt i e bn ine' 2+.2 9 'l ir 3 1 igur 3 al detai i wer th jd s e; .c

, lvFigur'eAisja jsub stanti f l transverse sectional view" offthe j'resilient support, for hejrridtor casingfi "H g; Fi ures is'a h .e ikieearns e taken at fight angles to I eci nkr hefi. withhe. e r in the a neutral position. v

Figure 16 i crank-shaft all l th disc 8 being pplication October-1, 1932,:Serial No; 635,748; :71 In Sweden July- 1, 1931 f ,1 J11.

adjustments of the gear-case with the ge'ars in the cow and high positions respectively. I A motor 2 is mounted onth cycle r19 thframe of the motor being supported on a sleeve 3 -=parallel to the crank shaft of the rnotor so that the frame may be oscillatajbly moiinted on the axle 4 extending from the fcentre 'of -the 'c'ycle Wheel: The motor isthus ableto"oscillateabout-the axle; the movement-bingcontro11ed-inboth directions bygrneans of 'a, spring foi examp le a spirahspring' 5 "Or mbberbuffeIS;whiclgat one end, isdii'ectIy 01*indiret1y Secured-t 'th mOt Ofl-hda at its 'dth! end to the frame of the cycle. The meme-share 23 1s provided with' a p nion e fig dtneretd by means di ahi'it24 idii ectlyion-mdirect1yengaging atoothed ring'fl, resilientlyiconncted t6 the bicycle wheel and joprnalie d tietwe a dis'cB 'and-a' hub 8 cen'trally mounted -on the cycle "wheel; said I ttachedto -thehubby means'of o t- 1 "The-toothed ring? is provided with projections 9 extending inwardly 'ar '1d across a circular slot 10 in the-'hub,andthe discfl8 in Which'slot elastic means such'asspiraPsprings 11 or rilibb'erbuffers' are located. The 'slotis provided with statio'nary sprir'igs'; rne 'spim 's ii'in 15 or the liki'control- 1mg theoscillation of the" niotor p be controlled from the "inside "or Iron the outsideso' tnanid lateral bendingoccu'r ""Figure i showssuchan 3 either end by phi isclosed :at

buffer snpnort 14 1" Afstayw I8 is secured to': the axle 4 in order to sup 'brp thesian'ie', the'othei end of: the said lsta bein'g,seemedtdfitherrameior the cycle; The .motorjjma beta; de red tyiJJor construction! .Theures1ient suspensi n of the motor ma es it necess ry: to make theconnctions r' of thepi n fi fir-P th i t xr its uh projections 12 sryihg as abutm np's-mr the-spiral r h .7 resilient. The pinion 6 and the ring 7=may a1ter tains a certain resilient free motion relative to the shaft.

In the arrangement of the gear-case shown in Figures 5-8 a bearing hub 20 extends from the crank-case of the motor 2 on which hub the gearcasing 21 is pivotally journalled a nut 22 preventing the axial displacement of the frame 21*. Two axles 25 are secured to the casing 21, pinions 26 being rotatablyjou nalled on the said axles. The pinions 26 are iri continuous engagjement with the central pinion 6. Antifriction rollers may be provided between shafts and pinions. In order to provide a greater ratio the pinions 26 are formed with special pinions 27 and 28 respectively, one pinion being smaller in diameter. than the. other.

The shafts are formed with oil'passages 29 extending from the ends of theaxl'es 25 toward'sthe crank-case of the motor and opening into the passages in the bearings. A number of holes 39 are provided in the face of the crank-case resting agalnstthe, frame 21* ofthe gear-case, the said holes being located .atthe same radial: distance fromlthe centre of the hub-2o asthma-passages in. the, axles; and placed laterally in such a. manner tbetin ach clutching p sition of the sear case;

the ar three: (shown; in'F-igs... 5., 7 and 8% f which one relatestp the. p sition of the ear case shownin Fist. 5., e., f r free motion, two of the holes. zeraee. the, two; openings-of thev oil. passa e 3Q- Ik h$h$fit f 2a to connect said pas a es with the int ri r of the c ankcase-r The remaining apertures 30. are. olos dby-th frame 211 of the semi ased-1;- 1

The. toothedj in a 2-; or a cor esp nding gear wheelis. prQY dedlate allr-ofi the pinions 27 and 2mm the same: plane with the some, wh ch t th d ring o gear. wheet mybe mounted on a s itable s rait; or directly: ontoaany of. thei yole. wheels. Th oscilla in sear-case.- 21 locked the clutching positions by means of a bolt 33, wlr obslopated a sleeve 38 forming: a, Part; f the eearoese 2 Said bolt brou ht; into or; out. fensa ement with beho es; 34., 3.5. and. 36. proti l d; in. or' on bebodx of. he motor, The bolt isactuated axially by, e., inet'l tendi to press it o twar s. from: the; boltsleetesttt but. it. mena so be actpatedand moved in the. opposite direc tion by tberotation of the. ec en ri diso39i, which. is secured ne shaft 0,,iourne 1 dand rotatabl in the outwardly turnedhead 4n, of thebolt, The shaft. ibis provided with a knob or,;handle- 42.. e. oscillating motion o the ear ase ar und the hub 2.0 i'sdimitedby the motion of. the sleeve 3.8.- between. nroieotions. 4st, The. insoieotionsv and the slee eare arranged; ini'such a. manner rel'a-i Q L 9 11, 6th L- h8 fiWhBn the sleeve contac s withorie or. the, other of theprojectionsithecorreot clutching position for pinion and gear wheel is b ained, as'well as, a. correct locking position for he. bolt. and he. sear-case. The free clutch: ins p sitionijslocated approximately midway bew n. the. pro ections 4.3,.

The, gear. operates in. the following manner: When th im toitis unning the motion. of the crank-shaftis transmitted to the. pinions 26, 2,7

and 26 by me;a.ns1ofjthe central pinion 6; if the bolt 33 is between the locking holes 35, 3 6 the pinions are-able to rotate freely relative to the toothed ringor the toothed wheel 7. When itis required to clutch and'transmit drive' i. e. when the speed is to-be'change'd, the bolt is released fromits lock-ingpositi'on in the hole 34,by rotating theshaft 40,;and thus the eccentric sheave 39 through half a revolutionbyineans or; the knob 42: By pulling theknob and thus-the shaft- 40 forwards or backwards the gear-case may be turned to a position, which is suitable for the clutching position desired, so that either the small pinion 27 or the big pinion 28 is brought into engagement with the ring 7. When the said position has been reached the bolt is in looking position in either of thelocking holes or 36 and if the shaft is again rotated through half a revolution, the. bolt enters thev holes, under the influence of the spring 39. and locks the gear-case.

It will be understood that the bolt 33 only fixes the gear case in relation to the motor, i. e., the function of the spring 5, or the resilient connection between motor and cycle takes place inde-- pendently of the said locking of the gear case.

It may be easily understood that the engagemerit; between pinion and cog ring is facilitated by the resilience of the cog ring in a peripheral direction shown in Figure 3.

The motion of the bolt, which, in the example shown, is. actuated in one direction. by a spring and in the other direction by an eccentric, cam or the-plike, may of course have a guided movement in bothdirections.v The shaft 40 may be 01 any desired, length, so asto be located in the most suitable handling position. on the cycle.

The passages of the: bearings: of the axles- 25 are greased automatically from, the crank-case when the; motoris running. During the; crankcase compression at very small quantity of gas mixedwith oil is forced through two of the holes 30; and into the oil passages 29rofthe1bearings,

The pinions 26' may b of a different size in order to permit of. difierent. ratios; by direct engagenientwith the cog 7, but in order to get, the, speedof, the motor; reduced, to the lower speed without usin h 8; cog wheels, it is advant geous to. combine the. pinions, 26-with the pinions 27 and 28, the latter being of different iameters; Instead of the cog ring 7 and the pinions 27. and 28 a sprocket and sprocket pinions; may be: provided so that a. chain drive of, the cyclemaybe. applied.

The, pinions; 26, 22 and- 28 m in. of course. also be provided: with shafts journalled in. ball bearings or in plain bearings.

The; casing; 21.- maybe arranged in such a manner-thatby meansoi actuating springs 45, shown in Figure, 8;, it, is brought back: automatically to its declutching position, when. the bolt 33 is released from any of the holes 35, 36. in which case the hole; 314 is: omitted. V

'I'o avert, the side vibrations; from the motor to,- be, transmitted, to the bicycle.- and the fixed shaft 4,, a rubber-bushing 46,01: thalike is. inserted between the.- sha-ft and the,- slseve Having now: described-.1115! invention, what I claim as new and GBSi QEtQ SGCLU-Q bMLQtteIsPatent I I 1. In combination with a bicycle comprising, a frame, wheeli axles carried by said. frame-and wheels for said axles, of a casing, a motor en.- closed tlnerein,x said casing, being. pivoted tothe axle of the. rear, wheel and resiliently supported on the framaa secondcasing, oscillatably mounted on said first, casing, a transmission gear set enclosed in said second casing and adapted to engage and disengage the wheel, and means to oscillate the second casing to bring alternate gears of the set into engagement with the wheel to effect a change in the-driving speed.

2. A bicycle, as claimed in claim 1 including a driving shaft for the motor, the second casing being rotatable about said shaft, said gear; set comprising a geandisposed on the said driving 1,935,895 shaft, 9. pair of spindles disposed in said second driving shaft for the motor, the second casing.

being rotatable about said shaft, said gear set comprising a gear disposed on the latter, a pair of spindles disposed in said second casing, and gears on said spindles in mesh with the gear on the shaft, said gears on the spindles each carrying a transmission gear of different diameter, a gear disposed on the rear wheel of the bicycle to alternately engage the gears on said spindles to change the speed of the wheel.

4. A bicycle as claimed in claim 1, in which-said first casing is provided with a plurality of recesses, the said means for moving the second casing being provided with a bolt adapted to engage the said recesses in .the first casing to lock the second casing thereto, whereby a gear of said set is locked in its engaged position with the wheel.

5. A bicycle, as claimed in claim 1, in which said first casing is provided with recesses, and in which the said second casing comprises a projection having a recess therein, a bolt in said latter recess adapted to engage the said recesses in the first casing, resilient means urging saidbolt out of the said recess in the projection, a cam associated with said bolt to control the same, and a control rod to actuate said cam and move the secondcas- 1 ing for setting the engagement 'ofa transmission gear with the wheel.

6. A bicycle as claimed in claim 1 in which said first casing is provided with recesses, and in which the said second casing comprises a projection having a recess therein, a bolt in said recess adaptmovement, the, axis of said movement being 00- axial with one of the cycle wheels and the shaft of the motor being eccentric with respect to said axis and in a position permitting the motor to oscillate up and down, a cog wheel transmission connecting the shaft of the motor with said cycle wheel, and a resilient connection between the cog Wheel transmission and the cycle wheel maintaining the cog wheels of the transmission in mesh during the oscillating movement of the motor.

CARL HULT. 

